This last design is really cool. There are a few things that stand out though. Hope you don't mind the Paint over
One is the anatomy of the character. Her neck it pretty long, the left arm I believe can be a bit longer, and the lower leg section can use some re-working
Before and after anatomy
Anatomy layer off
The colors in the piece look really awesome and I love how the character pops.
Hopefully you do get an answer from the art test. Seriously best of luck and keep up the good work.